Convert mojo::ErrorHandler usages into callbacks.

BUG=504666
Note: I am not in AUTHOR files yet. Please help by verifying that I have sign the CLA.

Please also help by submitting the try jobs.

Committed: https://crrev.com/a15bee4cc6b5163e30bf641af79a638a28147af9
Cr-Commit-Position: refs/heads/master@{#338433}

[lwchkg, 2015-07-10 04:26:09]

lwchkg@gmail.com changed reviewers:
+ amistry@chromium.org, avi@chromium.org

[lwchkg, 2015-07-10 04:27:58]

lwchkg@gmail.com changed reviewers:
+ darin@chromium.org

[lwchkg, 2015-07-10 04:34:40]

Dear all,

    Please help me to review the following:
Issue 1226253005: Convert mojo::ErrorHandler usages into callbacks. 

    Thank you.

Regards,
WC Leung

[lwchkg, 2015-07-10 12:48:55]

On 2015/07/10 04:34:40, lwchkg wrote:
> Dear all,
> 
>     Please help me to review the following:
> Issue 1226253005: Convert mojo::ErrorHandler usages into callbacks. 
> 
>     Thank you.
> 
> Regards,
> WC Leung

Compile failed.

[Avi (use Gerrit), 2015-07-10 15:41:23]

You've signed the CLA so you're ok there.

LGTM

[lwchkg, 2015-07-11 02:24:15]

The CQ bit was checked by lwchkg@gmail.com

[lwchkg, 2015-07-11 02:24:16]

The CQ bit was unchecked by lwchkg@gmail.com

[lwchkg, 2015-07-11 02:24:18]

The CQ bit was checked by lwchkg@gmail.com

[lwchkg, 2015-07-11 02:24:19]

The CQ bit was unchecked by lwchkg@gmail.com

[lwchkg, 2015-07-11 02:26:58]

The CQ bit was checked by lwchkg@gmail.com to run a CQ dry run

[commit-bot: I haz the power, 2015-07-11 02:27:08]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1226253005/20001

[commit-bot: I haz the power, 2015-07-11 02:34:37]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-07-11 02:34:38]

Dry run: Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[lwchkg, 2015-07-11 03:17:03]

The CQ bit was checked by lwchkg@gmail.com to run a CQ dry run

[lwchkg, 2015-07-11 03:17:03]

The patchset sent to the CQ was uploaded after l-g-t-m from avi@chromium.org
Link to the patchset: https://codereview.chromium.org/1226253005/#ps40001
(title: "Add lwchkg@gmail.com to AUTHORS file")

[commit-bot: I haz the power, 2015-07-11 03:17:12]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1226253005/40001

[commit-bot: I haz the power, 2015-07-11 04:15:03]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-07-11 04:15:04]

Dry run: This issue passed the CQ dry run.

[lwchkg, 2015-07-11 04:38:12]

The CQ bit was checked by lwchkg@gmail.com

[lwchkg, 2015-07-11 04:38:12]

The CQ bit was unchecked by lwchkg@gmail.com

[lwchkg, 2015-07-11 04:45:57]

The CQ bit was checked by lwchkg@gmail.com

[commit-bot: I haz the power, 2015-07-11 04:46:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1226253005/40001

[commit-bot: I haz the power, 2015-07-11 04:51:03]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-07-11 04:51:52]

Patchset 3 (id:??) landed as
https://crrev.com/a15bee4cc6b5163e30bf641af79a638a28147af9
Cr-Commit-Position: refs/heads/master@{#338433}